| 摘要 |
A rotary bur instrument includes an outer tube having an open distal end, and an inner member rotatably disposed in the outer tube. The inner member includes an inner tube having a distal end, a lumen therethrough and a bur tip at the distal end of the inner tube. The bur tip extends distally from the open distal end of the outer tube and has a passage extending longitudinally therethrough in communication with the lumen of the inner tube. The passage and the lumen define an aspiration passage through the inner member communicating with an aspiration port at a distal end of the bur tip. |
